あなた just saw your お気に入り celebrity in the store あなた like to ショップ in. What do あなた do?

SCreem screem screem!! tell my mum/friend and run and ask for pictures ect

Scream, cry, stalk :)
Once she realizes shes being followed i would try get the courage up to go talk to her :P

I'd probably just stand there staring at him until he left. Once he left, I would hate myself for not saying anything. Yet, I would make up a whole conversation, so my フレンズ would think it was actually interesting that I met a celebrity, even though they have no idea who he is.

Oh, Gube. I would do anything to just have あなた in the same store even if all I would do is stare and most likely embarrass myself.

I'm really touchie on this topic, becuase i can imagine them having girls follow and scream constantly at them, that would get so annoying!

I would say Hi ask for pictures autographs and say thanks, then leave them alone. I dont want to bug the heck out of them.

Go up to him and ask him for a hug. Also to sing to me a little. If his boyfriend is with him ask them to sing "Take Me または Leave Me" from Rent.

I'm talking about Neil Patrick Harris

Do a double take...Go up to him and be like. Hi, I 愛 you. (while crying) And be like im sorry if im bugging あなた but can i have your autograph? and a hug? and a picture? and a kiss? while crying still then i'd probably die....
not like エミネム would randomly be in a store in MN in the first place but still....

I WOULD FAINT AND THEN FADE INTO CARDIAC ARREST FROM ハート, 心 BREAK!
my mouth wide open,...... yes roll back,, あなた can tell we dont get many visitors up here in townsvillle...
AT ALL we only get SHORT STACK AND ELTON JOHN! thats all!

Leave him/her alone. They must hate paparazzi!

I would have face like this some time

Id have to bite my tounge from going screaming but I wouldn't bother him.... okay so mabey id ask for an autograph but then id leave him alone (Taylor Laughtner)